N-substituted amino-n-nitroso-amino-acetonitriles as anti-anginal agents

ABSTRACT

CERTAIN KNOWN N-SUBSTITUTED AMINO-N-NITROSO-AMINOACETONITRILES, E.G., N - MORPHOLINO-N-NITROSO-AMINOACETONITRILE, HAVE BEEN FOUND TO BE USEFUL AS ANTI-ANGINAL AGENTS.

United States Patent 3,777,026 N-SUBSTITUTED AMINO-N-NITROSO-AMINO- ACETONITRILES AS ANTI-ANGINAL AGENTS Paul L. Anderson, Dover, N.J., assignor to Sandoz- Wander, Inc., Hanover, N .J.

No Drawing. Continuation-impart of application Ser. No. 113,622, Feb. 8, 1971, which is a continuation-in-part of application Ser. No. 44,654, June 8, 1970, both now abandoned. This application June 14, 1972, Ser.

Int. Cl. A61k 27/00 US. Cl. 424-248 6 Claims ABSTRACT OF THE DISCLOSURE Certain known N-substituted amino-N-nitroso-aminoacetonitriles, e.g., N morpholino-N-nitroso-aminoaoetonitrile, have been found to be useful as anti-anginal agents.

This is a continuation-in-part of copending application Ser. No. 113,622, filed Feb. 8, 1971, now abandoned which in turn is a continuation-in-part of copending application Ser. No. 44,654, filed June 8, 1970, now abandoned.

This invention relates to N-nitroso-aminoacetomtrile derivatives. More particularly, this invention concerns the use of N substituted amino-N-nitroso-aminoacetonitriles as anti-anginal agents and to pharmaceutical compositions containing the above compounds as an active ingredient thereof.

The active agents with which this invention is concerned may be represented by the following structural formula where R represents hydrogen, alkyl or where m is 0, 1 or 2; and R and R each, independently, represent lower alkyl, i.e., alkyl having 1 to 4 carbon atoms, e.g., methyl, ethyl, n-propyl and the like; lower alkenyl, i.e., alkenyl having 3 to 5 carbon atoms, e.g., allyl, and the like; lower alkynyl, i.e., alkynyl having 3 to 5 carbon atoms; e.g., propargyl and the like; w-hydroxyloweralkyl, i.e., w-hydroxyloweralkyl having 2 to 4 carbon atoms, e.g., ,B-hydroxyethyl and the like; cycloalkyl having 3 to 8 carbon atoms, e.g., cyclohexyl and the like;

where m is as defined above; and R and R each, independently, represent hydrogen; hydroxy; halo having an atomic weight of about 19 to 36; cyano trifluoromethyl; lower alkyl as defined above; lower alkoxy i.e., alkoxy having 1 to 4 carbon atoms, e.g., methoxy, ethoxy, and the like; alkanoyloxy having 2 to 4 carbon atoms, e.g., acetoxy and the like; alkanoyl having 2 to 4 carbon atoms, e.g., acetyl and the like; w-hydroxylower alkyl, i.e., w-hydroXy-lower alkyl having 2 to 4 carbon atoms, e.g., fl-hydroxyethyl and the like; di-lower alkyl amino, i.e., di-lower alkyl amino wherein the lower alkyl is as defined above, e.g., dimethylamino, diethylamino and the like; or R and R together on adjacent atoms may be -CH OCH or -OCH O--; or R and R together gen atoms having an atomic weight between 19 to 36, e.g., tricfluoromethyl and the like or where m: is as defined above; and R represents hydroxy; halo as defined above; lower alkyl, as defined above; lower alkoxy, as defined above, alkanoyl having 2 to 4 carbon atoms; alkanoyloxy having 2 to 4 carbon atoms; w-hydroxy lower alkyl, as defined above, alkoxyalkyl having 2 to 4 carbon atoms, e.g., methoxyethyl and the like; lower alkyl having 1 to 4 carbon atoms substituted with 1 to 4 halogens having an atomic weight between about 19 to 36, e.g., trifluoromethyl, u,B-dichloroethyl and the like; or

where mis as defined above, provided that when R and R are both trifluoromethyl or when more than one of R is tri-fluoromethyl on a phenyl ring, they are on other than adjacent carbon atoms, and pharmaceutically acceptable salts of those compounds where X is R N The compounds of Formula I are known and may be prepared according to methods disclosed in the literature from known materials. The present invention contemplates only the novel use of such compounds, particularly as anti-anginal agents. The preferred compound for this use is N-morpholino-N-nitroso-aminoacetonitrile.

Other N disubstituted amino-N-nitroso-aminoacetonitriles which can be used in the treatment of angina pectoris include N-diallylamino-N-nitroso-aminoacetonitrile N-dimethylamino-N-nitroso-aminoacetonitrile N-diallylamino-N-nitroso-a-phenethybaminoacetonitrile N-diallylamino-N-nitroso-a-methyl-aminoacetonitrile N-methylpropargylamino-N-nitroso-aminoacetonitrile N-(N-allyl-fl-hydroxyethylamino)-N-nitroso-aminoacetonitrile N-methylcyclohexylarnino-N-nitroso-aminoacetonitrile N-methylphenylamino-N-nitroso-aminoacetonitrile N-methylphenylethylamino-N-nitroso-aminoacetonitrile N -dibenzylamino-N-nitroso-aminoacetonitrile N- (N-methyl-p-hydroxyphenylamino -N-nitroso-aminoacetonitrile N- (N-propyl-p-chlorophenylamino) -N-nitroso-aminoacetonitrile N- (N-methyl-p-cyanophenylamino) -N-nitroso-a-phenylamino acetonitrile N-(N-ethyl-o-trifluoromethylphenylamino -N-nitrosoaminoacetonitrile N- (N-methyl-o-methoxyphenylamino -N-nitroso-aminoacetonitrile N- (N-methyl-o-toluidino) -N-nitro so-aminoacetonitrile N- N-methyl-p-acetoxyphenylamino -N-nitroso-aminoacetonitrile N- (N-methyl-p-acetylphenylamino -N-nitroso-amino acetonitrile N- ('N-methyl-o- B-hydroxyethyl phenylamino -N-nitrosoaminoacetonitrile N (N-methyl-p-dimethylaminophenylamino) -Nnitrosoaminoacetonitrile N- (N-methyl-3 ,4-dimethyleneoxyphenylamino -N- nitroso-aminoacetonitrile or N- (N-methyl-3,4-methylenedioxybenzylamino) -N- nitroso-aminoacetonitrile.

The N-heterocyclic substituted N nitroso-aminoacetonitriles contemplated as active agents in the compositions of this invention include N-piperidino-N-nitroso-aminoacetonitrile N-piperidino-N-nitroso-a-methyl-aminoacetonitri1e N-hexamethyleneimino-N-nitroso-aminoacetonitrile N- (4-hydroxypip eridino -N-nitroso-aminoacetonitrile N- 2,4-dichloropiperidino) -N-nitroso-arninoacetonitrile N- (4-methylpiperidino -N-nitroso-aminoacetonitrile N- (4-methoxypiperidino N-nitroso-aminoacetonitrile N- (4-acetylpiperidino) -N-nitroso-aminoacetonitrile N-(4-acetoxypiperidino -Nnitroso-aminoacetonitrile N- (4- p-hydroxyethyl] -piperidino -N-nitrosoaminoacetonitrile N- (4-methoxyethylpiperidino) -N-nitroso-aminoacetonitrile N-(4-trifluoromethylpiperidino -N-nitroso-aminoacetonitrile N- Z-benzylpiperidino) -N-nitroso-aminoacetonitrile N-( 2-phenylpiperidino) -N-nitroso-aminoacetonitrile N-isoquinolino-N-nitrosoaminoacetonitrile N- l-hydroxyisoquinolino] -N-nitroso-aminoacetonitrile N-[ l-chloroisoquinolino] -N-nitroso-aminoacetonitrile N- l-methylisoquinolino] -N-nitroso-aminoacetonitrile N- l-methoxyisoquinolino] -N-nitroso-aminoacetonitrile N- l-acetylisoquinolino] -N-nitroso-aminoacetonitrile N-[ l-acetoxyisoquinolino]-N-nitroso-aminoacetonitrile N-[ 1-fl-hydroxyethylisoquinolino] -N-nitroso-aminoacetonitrile N- 1-methoxyethylisoquinolino] -N-nitroso-aminoacetonitrile 'N- [4-triiiuoromethylisoquinolino] -N-nitroso-aminoacetonitrile N-[ l-benzylisoquinolino] -N-nitroso-aminoacetonitrile N-( 2-hydroxymorpholino) -N-nitroso-aminoacetonitrile N- (2-chloromorpholino -N-nitroso*aminoacetonitrile N- (2-methylmorpholino) -N-nitroso-aminoacetonitrile N- 2-methoxymorpholir1o -N-nitroso-aminoacetonitrile N- (2-acetylmorpholino) -N-nitroso-aminoacetonitrile 'N- 2-acetoxymorpholino) -N-nitroso-amino acetonitrile N- 3 -B-hdyroxyethylmorpholino) -N-nitrosoaminoacetonitrile N- (3 -methoxyethylmrpholino -N-nitroso-aminoacetonitrile N-(3-trifluoromethylmorpholino) -N-nitroso-aminoacetonitrile N- 3-benzylmorpholino) -N-nitroso-aminoacetonitrile N-piperazino-N-nitroso-aminoacetonitrile N- [Z-hydroxypiperazino] -N-nitroso-aminoacetonitrile N- [2-chloro-4-methylpiperazino] -N-nitroso-aminoacetonitrile N- [2-methyl-4-acetylpiperazino] -N-nitros0-aminoacetonitrile N- [Z-methoxypiperazino] -N-nitroso-aminoacetonitrile N- [Z-acetylpiperazino] -N-nitroso-aminoacetonitrile N- [Z-acetoxypiperazino] -N-nitroso-aminoacetonitrile 'N- 2-;8-hydroxyethylpiperazino] -N-nitroso-aminoacetonitrile N- [Z-methoxyethylpiperazino] -N-nitroso-aminoacetonitrile N-[B-trifluoromethylpiperazino]-N-nitroso-aminoacetonitrile N- [3-benzylpiperazino] -N-nitroso-aminoacetonitrile N- [4- 3-hydroxyethylpiperazino] -N-nitroso-arninoacetonitrile N- [4-methoxyethylpiperazino] -N-nitroso-aminoacetonitrile N- [4-trifluoromethylpiperazino] -N-nitroso-aminoacetonitrile N- [4-benzylpiperazino]-Nnitroso-aminoacetonitrile or N- [4-;8-hydroxyethylpiperazino] -N-nitro soa-methylaminoacetonitrile.

As indicated previously, the compounds of Formula I are useful because they possess pharmacological activity in animals. In particular, the compounds are useful as anti-anginal agents as indicated by an increase in coronary blood flow and by a reduction of myocardial oxygen consumption in an anesthetized dog given 20 milligrams per kilogram of body weight of a compound of Formula I intravenously.

For such usage, compound (I) may be administered orally or parenterally, preferably sublingually, as such or admixed with conventional pharmaceutical carriers. They may be administered orally in such forms as tablets, dispersible powders, granules, capsules, syrups, and elixirs, and parenterally as solutions, suspensions, dispersions, emulsions, and the like, e.g., a sterile injectable aqueous suspension. The compositions for oral use may contain one or more conventional adjuvants, such as sweetening agents, flavoring agents, coloring agents and preserving agents, in order provide an elegant and palatable preparation. Tablets may contain the active ingredient in admixture with conventional pharmaceutically acceptable excipients, e.g., inert diluents, such as calcium carbonate, sodium carbonate, lactose and talc, granulating and disintegrating agents, e.g., starch and alginic acid, binding agents, e.g., starch, gelatin and acacia, and lubricating agents, e.g., magnesium stearate, stearic acid and talc. The tablets may be uncoated or coated by known techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period. Similarly, suspensions, syrups and elixirs may contain the active ingredient in admixture with any of the conventional excipients utilized for the preparation of such compositions, e.g., suspending agents (methylcellulose, tragacanth and sodium alginate), wetting agents (lecithin, polyoxyethylene stearate and polyoxyethylene sorbitan monooleate) and preservatives (ethyl-p-hydroxybenzoate). Capsules may contain the active ingredient alone or admixed with an inert solid diluent, e.g., calcium carbonate, calcium phosphate and kaolin. The injectable compositions are formulated as known in the art and may contain appropriate dispersing or wetting agents and suspending agents identical or similar to those mentioned above. These pharmaceutical preparations may contain up to about of the active ingredient in combination with the carrier or adjuvant.

The anti-anginal effective dosage of active ingredient employed for the treatment of angina pectoris may vary depending on the particular compound employed and the severity of the condition being treated. However, in general, satisfactory results are obtained when the compounds (I) are administered at a daily dosage of from about 0.01 milligram to about 25 milligrams per kilogram of animal body weight, preferably given in divided doses two to four times a day, or in sustained release form. For most large mammals in need of said treatment, the total daily dosage is from about 0.7 to about 50 milligrams, preferably administered sublingually. Dosage forms suitable for internal use comprise from about 0.175 to about 25 milligrams of the active compound in intimate admixture with a solid or liquid pharmaceutically acceptable carrier or diluent.

The preferred pharmaceutical compositions from the standpoint of preparation and ease of administration are 6 EXAMPLES 3 AND 4 Sterile suspension for injection and oral liquid suspension The following pharmaceutical compositions are formulated with the indicated amount of active agent using conventional techniques. The injectable suspension and the oral liquid suspension represent formulations useful as unit doses and may be administered in the treatment of angina pectoris. The injectable suspension is suitable for administration once a day whereas the oral liquid suspension is suitably administered 2 to 4 times per day for this purpose.

Weight (mg.)

Oral

1 For injection, q.s. to 1 ml. 2 Q.s. to 5 ml.

solid compositions, particularly hard-filled capsules and tablets containing about 1 to milligrams of active ingredient.

EXAMPLE 1 Tablets EXAMPLES 5 AND 6 Tablets and capsules suitable for oral administration Tablets and capsules containing the ingredients indicated below may be prepared by conventional techniques and are useful in treating agina pectoris at a dose of one tablet or Tablets suitable for oral administration which contain capsule 2 to 4 times a day.

Ingredient N-(2-chloromorpholino)-N-n.itroso-a.minoacetonitrile Tragacanth- Lactose Corn starch T810 nrn Magnesium stearatn Total.--

the following ingredients may be prepared by conventional tabletting techniques. Such tablets are useful in treating angina pectoris at a dose of one tablet 2 to 4 times a day.

Ingredient: Weight (mg.) N-morpholinmN-nitroso-aminoacetonitrile 10 Tragacanth 10 Lactose 237.5 Corn starch 25 Talcum 15 Magnesium steal-ate 2.5

EXAMPLE 2 Dry filled capsules Capsules suitable for oral administration which contain the following ingredients are prepraed in a conventional manner. Such capsules are useful in treating angina pectoris at a dose of one caspule 2 to 4 times a day.

Ingredient: Weight (mg) N-morpholino-N-nitroso-aminoacetonitrile 10 Inert solid diluent (starch, lactose, kaolin) 290 Weight (mg.)

Tablet Capsule Similarly, tablets and capsules are prepared using N-(Z-hydroxymorpholino)-N-nitroso-aminoacetonitrile; N- Z-methylmorpholino -N-nitroso-aminoacetonitrile; N-(Z-methoxymorpholino)-N-nitroso-aminoacetonitrile; N- (2-acetylmorpholino -N-nitroso-aminoacetonitrile; or N- (2-actoxymorpholino -N-nitroso-aminoacetonitrile in place of the N-(2-chloromorpholino)-N-nitroso-aminoacetonitrile above and are used as above in treating angina pectoris.

EXAMPLES 7 AND 8 Sterile suspension for injection and oral liquid suspension Weight (mg) Sterile Oral injectable liquid Ingredients N-(Z-hydroxymorpholino)-N-nitrosoaminoacetonitrile Sodium carboxy methyl cellulose U.S.P Methyl (pllnlnsn Polyvinylpyrrnlidnnn Lecithin Benzyl alr'nhnl Flavor suspension suspension Color Methyl paraben, U.S.P

Propyl paragen, U.S.P

Polysorbate 80 (e.g. Tween 80), U.S.P

Sorbitol solution, 70%, U S P Bufier agent to adjust plli for desired stability Water 1 For injection, q.s. to 1 ml.

1 Q.s. to ml. Injectable suspension and oral liquid suspensions are similarly prepared using N- 2-chloromorpholino) -N1nitroso-amiuoacetonitrile;

N- (Z-methylmorpholino -N-nitroso-aminoacetonitrile;

N- 3-fl-hydroxymethylmorpholino) -N-nitroso-aminoacetonitrile;

EXAMPLES 11 AND 12 Tablets and capsules suitable for oral administration Tablets and capsules containing the ingredients indicated below may be prepared by conventional techniques and are useful in treating angina pectoris at a dose of one tablet or capsule 2 to 4 times a day.

Ingredient N-methylphenylamino-N-nitroso-aminoacetonitrile Tragacanth- Lactose- Corn star Taloum Magnesium tmmtn Total Weight (mg.)

Tablet Capsule N-(3-methoxymethylmorpholino)-N-nitroso-aminoacetonitrile; N- 3-trifluoromethylmorpholino) -N-nitroso-aminoacetonitrile; or N-(3-benzylmorpholino)-N-nitroso-aminoacetonitrile in place of the N-(Z-hydroxymorpholino)-N-nitroso-aminoacetonitrile above and are used as above in treating angina pectoris.

EXAMPLES 9 AND 10 Tablets and capsules suitable for oral administration Tablets and capsules containing the ingredients indicated below may be prepared by conventional techniques and are useful in treating angina pectoris at a dose of one tablet or capsule 2 to 4 times a day.

Similarly tablets and capsules are prepared using Ingredient N-diallylamino-N-nitrosomminoacetonitrlle Tr m'manth Lactose. Corn star h Tqlnnm Magnesium stear Total Tablets and capsules are similarly prepared using N-dimethylamino-N-nitroso-arninoacetonitrile;

N-diallylamino-N-nitroso-u-phenethyl-amiuoacetonitrile;

N-diallylamino-N-nitroso-u-methyl aminoacetonitrile;

N-methylpropylamino-N-nitroso-aminoacetonitrile;

N- (N-allyl-p-hydroxymethylamino -N-nitroso-aminoacetonitrile; or

N-methylcyclohexylamino-N-nitroso-aminoacetonitrile in place of the N-N-diallylamino-N-nitroso-aminoacetonitrile above and are used as above in treating angina peetp Weight (mg) Tablet Capsule in place of the N-methylphenylamino-N-nitroso-aminoacetonitrile above and are used as above in treating angina pectoris.

EXAMPLES 13 AND 14 Sterile suspension for injection and oral liquid suspension The following pharmaceutical compositions are formulated with the indicated amount of active agent using conventional techniques. The injectable suspension and the oral liquid suspension represent formulations useful as unit doses and may be administered in the treatment of I l I I angina pectoris. The in ectable suspension is suitable for and are useful in treating angina pectoris at a dose of one administration once a day whereas the oral liquid suspentablet or capsule 2 to 3 times a day.

Weight (mg.)

Ingredient Tablet Capsule Tara] t l v e sion is suitably administered 2 to 4 times per day for this Similarly tablets and capsules are Prepared using purpose. N-piperidino-N-n1troso-a-methyl-aminoacetonitnle;

Weight (mg.)

Sterile Oral injectable liquid Ingredients suspension suspension N-(N-methyl-ol-toluidino)-N-nitroso-aminoacetonitrile 10 Sodium carboxy methyl cellulose U.S.P 1.

Methyl mllulnsa 0 Polyvjnylpy rnlidnna Lecithin- Benzyl almhnl Magnesium aluminum ilie f Flavor Colon.

Methyl paraben, U.S.P Propyl paraben U.S.P

Polysorbate 80 (eg Tween 80), 17.8.]? Sorbitol solution, 70%, U.S P

Butter agent to adjust pE for desired stability.. Q,.s. Water 1 For injection, Q.s. to 1 ml.

1 Q.s. to 5 ml.

Sterile injectable suspensions and oral liquid suspen- N-heXyleneimino-N-nitrosoaminoacetonitrile; sions are similarly prepared using N-(4-hydroxypiperidino)-N-nitroso-aminoacetonitrile; N- N-methyll acetoxyphenylamino -N-nitros o-aminogi 'g 'N'mtroso'ammoaceto' acetonitrile' gggr gg N mtroso ammo N-(4-methoxypiperidino) )-N-nitroso-aminoacetonitrile;

N-(4-acetylpiperidino)-N-nitroso-aminoacetonitrile; or N-gl-irlrligglgloolllydroxyethyl] phenyla N mtroso N-(4-acetoxypiperidino) -N-nitroso-aminoacetonitrile, N-(N-methyl-p-dimethylaminophenylamino)-N- in place of the N-piperazino-N-nitroso-aminoacetonitrile nitroso-aminoacetonitrile; above and are used as above in treating angina pectoris. N-(N-methyl-3,4-dimethyleneoxyphenylamino)-N- EXAMPLES 17 and 18 nitroso-aminoacetonitrile; or N-(N-methyl-3,4methylenedi0xybenzylamino)-N- Sterile suspenslon for in ection and oral liquid suspension nitroso'aminoacetonitrile The following pharmaceutical compositions are formuin place of the N (N-methyl-o-toluidi-no) N nitroso lated with the indicated amount of active agent using conaminoacetonitrile above and are used as above in treating ventioilal q The iniectablfi suspeflsion and the angina pectoris. oral liquid suspension represent formulatlons useful as EXAMPLES 15 A 16 unit doses and may be administered in the treatment of angina pectoris. The injectable suspension is suitable for administration once a day whereas the oral liquid suspen- Tablets and capsules containing the ingredients indision is suitably administered 2 to 4 times per day for this cated below may be prepared by conventional techniques purpose.

Tablets and capsules suitable for oral administration Weight (mg.)

Sterile Oral injectable liquid Ingredients suspension suspension V 1 For injection q.s. to 1 ml.

2 Q.s. to 5 m1.

Sterile injectable suspensions and oral liquid suspensions similarly are prepared using N- (4- fl-hydroxyethyl] pi peridino -N-nitroso-a-meth yl aminoacetonitrile;

N- (4-methoxyethylpiperidino -N-nitroso-aminoacetonitrile;

N- (4-trifiuoromethylpiperidino) -N-nitroso-aminoacetonitrile;

N- 2-benzylpiperidino -N-nitroso-aminoacetonitrile; or

N- 2-phenylpiperidino -N-nitrosoaminoacetonitrile in place of N isoquinolino-N-nitroso-aminoacetonitrile above and are used as above in treating angina pectoris.

EXAMPLES 21 AND 22 Tablets and capsules suitable for oral administration Tablets and capsules containing the ingredients indicated below may be prepared by conventional techniques and are useful in treating angina pectoris at a dose of one tablet or capsule 2 to 4 times a day.

Ingredient Weight (mg.)

Tablet Capsule N-(l-B-hydroxyethyllsoquinolino)-N-nitrosoarninoacetonitrile.

Trau-qnan th Lactose.

Corn star Talenm Magnesium stear Total in place of the N 4 -[fi-hydroxyethyl]piperazino)-N- nitrosoaminoacetonitrile above and are used as above in treating angina pectoris.

EXAMPLES 19 and Sterile suspension for injection and oral liquid suspension The following pharmaceutical compositions are formulated with the indicated amount of active agent using conventional techniques. The injectable suspension and the oral liquid suspension represent formulations useful as unit doses and may be administered in the treatment of angina pectoris. The injectable suspension is suitable for administration once a day Whereas the oral liquid suspension is suitably administered 2 to 4 times per day for this purpose.

EXAMPLES 23 AND 24 Sterile suspension for injection and oral liquid suspension The following pharmaceutical compositions are formu- Weight (mg) Sterile Oral injectable liquid Ingredients suspension suspension N-iosquinolinc-N-nitroso-aminoacetonitrile Sodium carboxy methyl cellulose U.S.P Methyl (Plln'lnse Polyvinylpyrrnlidnna Benzyl nlonhnl Magnesium aluminum silicate- Flavor Color Methyl paraben, U.S.P

Propyl paraben, U.S.P

Polysorbate 80 (e.g. Tween 80), U.S.P

Sorbltol solution, U.S P

Bufler agent to adjust pH for desired stability Water I For injection, q.s. to 1 m1. 2 Q.s. to 5 ml.

Sterile injectable suspensions and oral liquid suspensions similarly are prepared using N-( l-hydroxyisoquinolino -N-nitroso-aminoacetonitrile; 70

N-( l-chloroiso quinolin) -N-nitroso-aminoacetonitrile;

N- l-methylisoquinolino -N-nitroso-aminoacetonitrile;

N-( l-methoxyisoquinolino -N-nitroso-aminoacetonitrile;

N-( l-acetylisoquinolino)-Nnitroso-aminoacetonitrile lated with the indicated amount of active agent using conventional techniques. The injectable suspension and the oral liquid suspension represent formulations useful as unit doses and may be administered in the treatment of angina pectoris. The injectable suspension is suitable for administration once a day whereas the oral liquid suspension is suitable administered 2 to 4 times per day for this purpose.

Weight (mg.)

Sterile Oral lnjectable liquid Ingredients suspension suspension N-piperazino-N-nitroso-aminoacetonitlile 10 10 Sodium carboxy methyl cellulose U.S.P. 1. 25 12. 5 Methyl cellulose Polyvinylpyrrolidone Leeithin Benzyl alonhnl Magnesium aluminum silimm .5 Flavor .s. Color .s. Methyl paraben, U.S.P 4. 6 Propyl paraben U.S.P 1.0 Polysorbate 80 (eg. Tween 80), U.S.P Sorbitol solution, 70%, U.S.P 2. 500 Butler agent to adjust pH for desired stability Qs. Q.s. Water 1 For injection Q,.s. to 1 1111. "$1.5. to 6 ml.

Sterile injectable suspensions and oral liquid suspenniques. Such tablets are useful in treating angina pectoris sions are similarly prepared using and are taken sublingually as the need arises. N-(Z-hydroxypiperazino) -N-nitroso-aminoacetonitrile; di I Weight (mg') 9 9- y p p N-morpholino-N-nitroso-aminoacetonitrile 10 acetomtrlle; Mannitol 43.5 N-(2-methyl-4-acety1piperazino)-N-nitroso-aminoaceto- Lactose 43 5 nitrile; P01 in 1 rolidine 2 0 N-(l-methmgypiperazino)JET-Himse-aminoacetoqitrile; Mallesluniltearate 130 N- (2-acetylp1peraz1no -N-n1troso-ammoacetomtrile; N-(Z-acetoxypiperazino)-N-nitroso-aminoacetonitrile; Similarly, tablets useful in the treatment of angina N-(Z-fi-hydroxyethylpiperazino)-N-nitroso-aminoacetopcctoris which may be administered sublingually are prenitrile; pared using N- Z-methox eth l i eraz'no -N-nitroso-aminoaceto- IEitrfle; or y yp p l N-diallylammo-N-nitroso-aminoacetonitrile; N- 3 -trifluoromethylpiperazino) -N-nitroso-aminoaceto- N-rrgethylghenylammo-N-nitrosoaminqacewnitrile;

nitrile N-piperldmo-N-mtroso-aminoacetonitrile;

N-isoquinolino-N-nitroso-aminoacetonitrile;

as the active agent in place of N-piperazino-N-nitroso- N (4 p hydroxyethylpiperazino) N nitmso aminoaceto aminoacetonitrile above and are used as above in treating nitrile; or angma Pectons' N-(4-[3-hydroxyethylpiperazino)-N-nitroso-u-methy1- EXAMPLES 25 AND 26 40 t m'trile Tablets and capsules suitable for oral administration i place of the N morpholino N niu-oso aminoacetonitrfle Tablets and capsules containing the ingredients indiabovecated below may be prepared by conventional techniques What is clalmed and are useful in treating angina pectoris at a dose of A method treating angina pectol'is which C0111 one tablet or capsule 2 to 4 times a day. prises orally or parenterally administering to a mammal Weight (mg.)

Ingredient Tablet Capsule N-(Hi-hydroxyethylpiperazino)-N-nitroso-aminoacetonitiile Tra ncani'h Lactose Corn star h Talmim Magnesium tearate Total..

Similarly, tablets and capsules are prepared using in need of said treatment an anti-anginal effective amount N-(3-benzylpiperazino) -N-nitroso-aminoacetonitrile; of a compound of the formula N-(4-methoxyethylpiperazino)-nitroso-aminoacetonitrile; N o l N-(4-trifluoromethylpiperazino)-N-nitroso-amino- E acetonitrile; NN H-CN N-(4-benzylpiperazino)-N-nitroso-aminoacetonitrile; or N-(4-,8-hydroxyethylpiperazino)-N-nitroso-a-methyl- Where aminoacetonitrile; R represents hydrogen, lower alkyl or N- (4-fi-hydroxyethylpiperazino) -N-nitroso-a-phenylaminoacetonitrile in place of the N-(4-;9-hydroxyethylpiperazino)-N-nitrosoaminoacetonitrile above and are used as above in treating and angina pectoris R represents hydroxy; halo having an atomlc Weight EXAMPLE 27 of about 19 to 36; lower alkyl; lower alkoxy; alkanoyl having 2 to 4 carbon atoms; alkanoyloxy having 2 A tablet suitable for the preferred sublingual mode to 4 carbon atoms; w-hydroxy lower alkyl; alkoxy of administration may contain the following ingredients alkyl alkyl having 2 to 4 carbon atoms; lower alkyl and may be prepared by conventional tabletting tech having 1 to 4 carbon atoms substituted with 1 to 4 halogen atoms having an atomic weight between about 19 to 36; or

where m is 0, 1 or 2; and p is 0, 1 or 2.

2. A method according to claim 1 in which the compound is N-morpholino-N-nitroso-aminoacetonitrile.

3. A method according to claim 1 wherein the compound is administered to a mammal in need of said treatment at a daily dose of .from about 0.7 molligram to about 50 milligrams.

4. A method according to claim 1 wherein the compound is administered to a mammal in need of said treatment in a unit dosage form comprising said compound to the extent of from about 0.175 milligrams to about 25 milligrams per unit dosage.

5. A tablet suitable for sublingual administration useful for treating angina pectoris comprising as an active ingredient thereof an anti-angial effective amount of a compound of the formula 1 6 where R represents hydrogen, lower alkyl or and where m is 0,101 2; and

p is 0, 1 or 2 in combination with solid pharmaceutically acceptable excipients.

6. A tablet according to claim 5 in which the active ingredient i N-morpholino-N-nitroso-aminoacetonitrile.

References Cited Derwent Farmdoc No. 30,749, Neth. Pat. No. 6710945, pp. 497-505, published Feb. 12, 1968.

JEROME D. GOLDBERG, Primary Examiner 

